US2178628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thrust bearing for rolling mills
Assignee: MACKINTOSH HEMPHILL Co
•
Filing: 1934-03-08
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Granted: 1939-11-07
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Expires: 1954-03-08
Abstract
No abstract record available.
Inventors
- 👤 Wentzel R Duda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:13
CPC Classifications
B; B21; B21B; B21B31/00; B21B31/16; B21B31/18; B21B13/00; B21B2013/006; B21B2273/00; B21B2273/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-11-06 | 1943-05-08 | 1943-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-11-06 | 1947-05-08 | 1947-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-11-06 | 1951-05-08 | 1951-11-07 | $7700.00 | Window Closed / Lapsed |